EP2821234A1 - Printer device - Google Patents
Printer device Download PDFInfo
- Publication number
- EP2821234A1 EP2821234A1 EP13754524.0A EP13754524A EP2821234A1 EP 2821234 A1 EP2821234 A1 EP 2821234A1 EP 13754524 A EP13754524 A EP 13754524A EP 2821234 A1 EP2821234 A1 EP 2821234A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- opening
- printer apparatus
- platen roller
- frame
- platen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 14
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/02—Rollers
- B41J13/076—Construction of rollers; Bearings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/02—Platens
- B41J11/04—Roller platens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
- B41J15/042—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles for loading rolled-up continuous copy material into printers, e.g. for replacing a used-up paper roll; Point-of-sale printers with openable casings allowing access to the rolled-up continuous copy material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
- B41J25/312—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print pressure adjustment mechanisms, e.g. pressure-on-the paper mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
- B41J25/316—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with tilting motion mechanisms relative to paper surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/30—Embodiments of or processes related to thermal heads
- B41J2202/31—Thermal printer with head or platen movable
Definitions
- a printer apparatus for outputting a receipt or the like is widely used for various purposes such as a cashier terminal of a shop or an ATM (Automated Teller Machine) or a cash dispenser of a bank.
- a printer apparatus outputs a receipt by printing characters or the like on a recording paper (e.g., heat sensitive paper) with a thermal head while conveying the recording paper.
- a recording paper e.g., heat sensitive paper
- characters or the like are printed on the recording paper by providing the recording paper between the thermal head and a platen roller.
- the platen roller is detachably attached to the printer apparatus, so that the recording paper can be easily provided between the thermal head and the platen roller.
- the recording paper is sandwiched between the thermal head and the platen roller by pressing the thermal head toward a side in which the platen roller is provided. In this state where the recording paper is sandwiched between the thermal head and the platen roller, printing by the thermal head is performed.
- a biasing member e.g., coil spring
- One end of the coil spring or the like contacts the thermal head whereas the other end of the coil spring or the like contacts a rear surface support plate.
- a recovering force of the coil spring or the like causes pressure to be exerted to the thermal head in the direction toward the platen roller via the rear surface support plate.
- Patent Document 2 discloses a lock arm that supports a bearing of a platen roller in which a position of the platen roller is defined by using a biasing force of a pressure spring exerting pressure to a thermal head.
- Patent Document 4 discloses a configuration that includes a first spring provided between a lock arm and a thermal head for biasing a platen roller in a direction toward the thermal head, and a second spring provided between the thermal head and a frame body for biasing the thermal head in a direction to contact the platen roller.
- a platen roller is retained by a lock arm by way of, for example, a platen bearing formed of a mold resin or the like.
- the thermal printer that is used for various purposes may be accidentally dropped or applied with an unexpected amount of force when the thermal printer is being used.
- the platen bearing or other members of the platen roller may be damaged (malfunction) and become unusable if the platen roller cannot disengage from the thermal printer.
- the platen roller may not easily disengage from the thermal printer even if force is exerted to the thermal printer when the thermal printer is dropped.
- the platen bearing or the like could be damaged by the impact caused when, for example, the thermal printer is dropped. As a result, the thermal printer can no longer be used.
- a printer apparatus including a frame, a printer head, a platen roller that is supported by the frame, a biasing member that is provided between the frame and the printer head and configured to exert force toward the platen roller, and an opening/closing arm supported by the frame to rotate and move about an arm rotation shaft, wherein a contact part between the opening/closing arm and a platen bearing of the platen roller is positioned opposite from a side in which the printer head is provided with respect to a line that connects a center of the arm rotation shaft and a center of the platen bearing.
- a printer apparatus that can be steadily used for a long period owing to its resistance to damage even in a case where, for example, impact is applied to the printer apparatus when the printer apparatus is dropped.
- Fig. 1 is a perspective view of a printer apparatus according to the embodiment
- Fig. 2 is a perspective view illustrating the printer apparatus viewed from another angle in a state a housing cover is attached to the printer apparatus
- Fig. 3 is a perspective view illustrating the printer apparatus from the same angle as Fig. 2 in a state where a gear part 180 and other elements are removed from the printer apparatus.
- the printer apparatus of the embodiment includes a thermal head 110 which is a printer head, a platen roller 120, an opening/closing arm 130, a first biasing spring 140, and a second biasing spring 150.
- the thermal head 110, the platen roller 120, the opening/closing arm 130, the first biasing spring 140, and the second biasing spring 150 are mounted to the frame 160.
- the platen roller 120 is supported by the frame 160 by force exerted from the first biasing spring 140.
- a coil spring, a leaf spring or the like may be used as the first biasing spring 140, and a torsion spring or the like may be used as the second biasing spring.
- a platen bearing 121 of the platen roller 120 is rotatably supported by a frame side 161 of the frame 160.
- a motor 170 for rotating the platen roller 120 is provided to the frame 160. By rotating the motor 170, the platen roller 120 is rotated via the gear part 180.
- a heat sink 111 corresponding to a head support plate is provided to a rear surface of the thermal head 110.
- the frame 160 includes a frame rear surface part 162 facing the heat sink 111.
- the first biasing spring 140 such as a coil spring is provided between the heat sink 111 and the frame rear surface part 162 of the frame 160.
- the thermal head 110 is pressed toward a side in which the platen roller 120 is provided owing to a recovering force of the first biasing spring 140 transmitted via the heat sink 111.
- the opening/closing arm 130 is supported by the frame side surface 161 to rotate and move about the arm rotation shaft 131.
- the second biasing spring 150 such as a torsion coil spring is provided between the opening/closing arm 130 and the frame side surface 161. Specifically, although not illustrated in the drawings, one end of the second biasing spring 150 is connected to the frame part 160 and the other end of the second biasing spring 150 is connected to the opening/closing arm 130.
- the opening/closing arm 130 can be rotated and moved about the arm rotation shaft 131 by pressing an opening/closing arm cap receiving part 134.
- the opening/closing arm cap receiving part 134 By releasing the force exerted to the opening/closing arm cap receiving part 134, the opening/closing arm cap receiving part 134 moves upward by the recovering force of the second biasing spring 150. Thereby, the opening/closing arm 130 returns to its initial state.
- Fig. 4 is a side view illustrating the printer apparatus of the embodiment
- Fig. 5 is an enlarged view of a portion of Fig. 4
- Fig. 6 is a side view of the frame 160.
- a frame opening part 162 into which the platen bearing 121 can be guided is provided in the frame side surface 161 of the frame 160 for supporting the platen roller 120.
- the frame opening 162 is formed in a U-shape.
- First guide part 163 and the second guide part 164 are formed at an inlet part of the frame opening part 162 for guiding the platen bearing 121 into the frame opening part 162.
- the first guide part 163 is formed on a side more toward the thermal head 110 (heat sink 111) than the second guide part 164.
- the first guide part 163 is formed longer than the second guide part 164.
- a line L1 extends along a straight edge part 163a formed in the frame opening part 162, and a line L2 extends along a straight edge part 164a formed in the frame opening part 162 are formed to be substantially parallel to each other. Further, the line L1 and the line L2 are formed in a direction that is substantially orthogonal to a direction of a recovery force of the first biasing member 140 of the embodiment.
- the platen bearing 121 is supported by contacting an insulating part 164a of the second guide part 164 by the recovering force of the first biasing spring 140. Therefore, the line L2 becomes a tangential line between the edge part 164a of the second guide part 164 and the platen bearing 121.
- the edge part 164a of the second guide part 164 is formed on a line L3 that runs through a center 121a of the platen bearing 121.
- the edge part 164a of the second guide part 164 may be formed above the line L3 in the drawing.
- the straight edge part 164a overlapping the line L2 may be formed to have a length of approximately 0.2 mm.
- the opening/closing arm 130 is described with reference to Figs. 4 , 5 , and 7 .
- the opening/closing arm 130 is rotated and moved about the arm rotation shaft 131 by pressing the opening/closing arm cap receiving part 134.
- An opening/closing arm opening part 135 into which the platen bearing 121 of the platen roller 120 is inserted is provided in an opening/closing arm side surface.
- a lock part 136 is provided at a position that is the edge of the opening/closing arm opening part 135 and farthest from the arm rotation shaft 131.
- FIG. 7 is a side view of the opening/closing arm 130.
- the platen bearing 121 of the platen roller 120 is pressed by the recovering force of the first biasing spring 140 in the direction of the arrow A1 as illustrated in Fig. 4 . Further, the frame 160 is pressed by the platen bearing 121 in the direction of the arrow B1 in Fig. 4 . Accordingly, the platen bearing 121 is rotatably supported by the frame 160. That is, the platen bearing 121 is supported in a state provided in the opening/closing arm opening part 135 while being supported by the frame 160 with respect to the biasing direction of the recovering force of the first biasing spring 140 illustrated with the arrow A1. Accordingly, the platen bearing 121 does not contact the opening/closing arm 130 with respect to the direction illustrated with the arrow B1. Therefore, the platen bearing 121 is not supported by the opening/closing arm 130.
- the platen bearing 121 contacts the lock part 131 of the opening/closing arm 130 at a contact point 136a, so that the platen bearing 121 can be prevented from moving in an upward/downward direction in Fig. 5 . Accordingly, the lock part 136 does not support the platen bearing 121 with respect to the biasing direction of the recovering force of the first biasing spring 140 illustrated with the arrow A1 but is for preventing the platen bearing 121 from moving in a direction that is substantially orthogonal to the direction illustrated with the arrow A1.
- the below-described projecting part 138 is provided in a part of the side surface of the opening/closing arm 130.
- the printer apparatus of this embodiment has a structure in which the platen roller 120 can easily detach from the printer apparatus when, for example, a force no less than a predetermined amount is exerted when the printer apparatus is dropped. Accordingly, even if, for example, the printer apparatus is dropped, a large amount of force is not applied to the platen bearing 121 and the like via the opening/closing arm 130 and the like. Thus, a component formed of a mold resin such as the platen bearing 121 can be prevented from being damaged.
- the contact point 136a between the platen bearing 121 and the lock part 136 of the opening/closing arm 130 is positioned opposite from the side in which the thermal head 110 (heat sink 111) and the first biasing spring 140 are provided with respect to a line L4 illustrated in Fig. 8.
- Fig. 8 illustrates the line L4 as a chain double-dashed line that connects a center 131a of the arm rotation shaft 131 and the center 121a of the platen bearing 121. That is, the contact point 136a is formed in a position opposite from the direction in which the platen roller 120 is disengaged (illustrated with an arrow C1) with respect to the line L4.
- the contact point 136a By forming the contact point 136a in a position opposite from the direction in which the platen roller 120 is disengaged (illustrated with the arrow C1 of Fig. 9 ) with respect to the line L4, a force is exerted to the platen roller 120 in a direction causing the disengagement of the platen roller 120 (illustrated with the arrow C1 of Fig. 9 ) when, for example, the printer apparatus is dropped. Further, the platen roller 120 can easily disengage because the opening/closing arm 130 can be moved even when the force exerted in the disengaging direction of the platen roller 120 is relatively small.
- a case of forming the contact point in a position on the side of the disengaging direction of the platen roller 120 as illustrated with the arrow C1 (i.e. the side in which the thermal head 110 is provided) with respect to the line L4 is described.
- a force is exerted to the platen roller 120 in a direction causing the removal of the platen roller 120 as illustrated with the arrow C1.
- the opening/closing arm 130 cannot be moved unless the force is significantly large, the platen roller 120 cannot disengage.
- the force that is exerted to the printer apparatus in the direction causing removal of the platen roller 120 is also exerted to the platen bearing 121 of the platen roller 120 via the opening/closing arm 130. Therefore, the platen bearing 121 may be damaged by the exerted force.
- the platen roller 120 can easily disengage from the printer apparatus when force is exerted to the platen roller 120 in the direction illustrated with the arrow C1. Therefore, the platen bearing 121 or the like can be prevented from being damaged. That is, in a state of Fig. 10(a) , the printer apparatus of this embodiment can easily shift to a state of Fig. 10(b) when force is exerted in the direction C causing removal of the platen roller 120. Thus, the platen roller 120 can easily disengage from the printer apparatus. Accordingly, the platen bearing 121 or the like can be prevented from being damaged.
- the amount of force exerted to the platen roller 120 of the printer apparatus during the removing of the platen roller 120 depends on the size of the angle ⁇ formed by the line L4 and the contact point 136a. Specifically, if the value of the angle ⁇ is small, the platen roller 120 cannot disengage unless a relatively large amount of force is exerted to the printer apparatus. If the value of the angle ⁇ is large, the platen roller 120 can easily disengage even when an amount of force exerted to the printer apparatus is small.
- the amount of force required to disengage the platen roller 120 from the printer apparatus may differ depending on the purpose or usage of the printer apparatus.
- the amount of force required for the platen roller 120 to disengage from the printer apparatus can be adjusted by adjusting the angle ⁇ , that is, the position of the contact point 136a.
- the contact point 136a is formed to be positioned between the line L3 and the line L4.
- the amount of force that causes the platen roller 120 to disengage from the printer apparatus may be changed due to a slight change in the position of the contact point 136a. That is, even in a case where the printer apparatus is designed to cause the platen roller 120 to disengage from the printer apparatus when a predetermined amount of force is exerted to the printer apparatus, the position of the contact point 136a may deviate from a desired position due to, for example, manufacturing error. Thus, some printer apparatuses may cause the platen roller 120 to disengage from the printer apparatus whereas some printer apparatus may cause the platen roller 120 not disengage from the printer apparatus. Thus, if the platen roller 120 is not disengaged from the printer apparatus even when a large amount of force is exerted to the printer apparatus, the printer apparatus may be damaged when, for example, the printer apparatus is dropped.
- the projecting part 138 is provided in the opening/closing arm 130 as illustrated in Figs. 11 and 12 .
- the platen bearing 121 and the lock part 136 of the opening/closing arm 130 can contact at a predetermined position which is the contact point 136a.
- the platen roller 120 can almost always disengage from the printer apparatus when a substantially constant amount of force is exerted to the printer apparatus. Thereby, the platen bearing 121 or the like can be further prevented from being damaged.
- Fig. 13 illustrates the printer apparatus of the embodiment in a state prior to having a lever cap 234 attached thereto.
- Fig. 13(a) is a perspective view of the printer apparatus observed from the front side
- Fig. 13(b) is a perspective view of the printer apparatus observed from the rear side
- Fig. 14 illustrates the printer apparatus of the embodiment in a state having the lever cap 234 attached thereto.
- Fig. 14(a) is a perspective view of the printer apparatus observed from the front side
- Fig. 14(b) is a perspective view of the printer apparatus observed from the rear side.
- Fig. 14(a) is a perspective view of the printer apparatus observed from the front side
- Fig. 14(b) is a perspective view of the printer apparatus observed from the rear side.
- Fig. 14(a) is a perspective view of the printer apparatus observed from the front side
- Fig. 14(b) is a perspective view of the printer apparatus observed from the rear side.
- Fig. 14(a) is
- FIG. 15 illustrates the printer apparatus of the embodiment in a state having a depression button 240 attached thereto.
- Fig. 15(a) is a perspective view of the printer apparatus observed from the front side
- Fig. 15(b) is a perspective view of the printer apparatus observed from the rear side.
- Fig. 16(a) illustrates a state where the depression button 240 is not yet pressed
- Fig. 16(b) illustrates a state where the depression button 240 is pressed.
- the opening/closing arm cap receiving part 134 is provided in the opening/closing arm 130 as illustrated in Fig. 13 .
- the lever cap 234 is attached to the opening/closing arm cap receiving part 134 as illustrated in Fig. 14
- the depression button 240 is attached to the lever cap 234 as illustrated in Fig. 15 .
- the opening/closing arm 130 can be operated to move by pressing the depression button 240 interposed by the lever cap 234 and the opening/closing arm cap receiving part 134. That is, the lever cap 234 is lowered from the state illustrated in Fig. 16(a) to the state illustrated in Fig. 16(b) by depressing the depression button 240. Thereby, the opening/closing arm 130 is operated to move about the arm rotation shaft 131.
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- Electronic Switches (AREA)
- Handling Of Sheets (AREA)
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Abstract
Description
- The embodiments discussed herein are related to a printer apparatus.
- A printer apparatus for outputting a receipt or the like is widely used for various purposes such as a cashier terminal of a shop or an ATM (Automated Teller Machine) or a cash dispenser of a bank. For example, a printer apparatus outputs a receipt by printing characters or the like on a recording paper (e.g., heat sensitive paper) with a thermal head while conveying the recording paper.
- When using the printer apparatus, characters or the like are printed on the recording paper by providing the recording paper between the thermal head and a platen roller. The platen roller is detachably attached to the printer apparatus, so that the recording paper can be easily provided between the thermal head and the platen roller.
- Accordingly, the recording paper is sandwiched between the thermal head and the platen roller by pressing the thermal head toward a side in which the platen roller is provided. In this state where the recording paper is sandwiched between the thermal head and the platen roller, printing by the thermal head is performed.
- Thus, typically, a biasing member (e.g., coil spring) is provided behind the thermal head. One end of the coil spring or the like contacts the thermal head whereas the other end of the coil spring or the like contacts a rear surface support plate. Thereby, a recovering force of the coil spring or the like causes pressure to be exerted to the thermal head in the direction toward the platen roller via the rear surface support plate.
- Patent Document 2 discloses a lock arm that supports a bearing of a platen roller in which a position of the platen roller is defined by using a biasing force of a pressure spring exerting pressure to a thermal head. Patent Document 4 discloses a configuration that includes a first spring provided between a lock arm and a thermal head for biasing a platen roller in a direction toward the thermal head, and a second spring provided between the thermal head and a frame body for biasing the thermal head in a direction to contact the platen roller.
- [Patent Document 1]: Japanese Patent No.
3734753 - [Patent Document 2]: Japanese Patent No.
3599595 - [Patent Document 3]: Japanese Laid-Open Patent Publication No.
2000-318260 - [Patent Document 4]: Japanese Laid-Open Patent No.
2008-68551 - [Patent Document 5]: Japanese Laid-Open Patent No.
2000-94767 - Typically, in a case of a thermal printer that prints characters or the like on a recording medium by using a thermal head, a platen roller is retained by a lock arm by way of, for example, a platen bearing formed of a mold resin or the like. The thermal printer that is used for various purposes may be accidentally dropped or applied with an unexpected amount of force when the thermal printer is being used. In this case, the platen bearing or other members of the platen roller may be damaged (malfunction) and become unusable if the platen roller cannot disengage from the thermal printer.
- Specifically, in a case of, for example, a thermal printer that has a lock arm formed in its disengaging direction (removing direction) in a manner covering a large portion of the platen bearing or the like of the platen roller, the platen roller may not easily disengage from the thermal printer even if force is exerted to the thermal printer when the thermal printer is dropped. Thus, if the platen roller cannot disengage from the thermal printer, the platen bearing or the like could be damaged by the impact caused when, for example, the thermal printer is dropped. As a result, the thermal printer can no longer be used.
- According to an embodiment of the present invention, it is an object to provide a printer apparatus that is resistant to damage even in a case where, for example, impact is applied to the printer apparatus when the printer apparatus is dropped.
- According to an aspect of the invention, there is provided a printer apparatus including a frame, a printer head, a platen roller that is supported by the frame, a biasing member that is provided between the frame and the printer head and configured to exert force toward the platen roller, and an opening/closing arm supported by the frame to rotate and move about an arm rotation shaft, wherein a contact part between the opening/closing arm and a platen bearing of the platen roller is positioned opposite from a side in which the printer head is provided with respect to a line that connects a center of the arm rotation shaft and a center of the platen bearing.
- According to an embodiment of the present invention, there can be provided a printer apparatus that can be steadily used for a long period owing to its resistance to damage even in a case where, for example, impact is applied to the printer apparatus when the printer apparatus is dropped.
-
-
Fig. 1 is a perspective view of a printer apparatus according to an embodiment of the present invention; -
Fig. 2 is an explanatory diagram of the printer apparatus of the embodiment observed diagonally (1); -
Fig. 3 is an explanatory diagram of the printer apparatus of the embodiment observed diagonally (2); -
Fig. 4 is an explanatory diagram of the printer apparatus of the embodiment observed from its side; -
Fig. 5 is an enlarged partial view ofFig. 4 ; -
Fig. 6 is an explanatory diagram of aframe 160; -
Fig. 7 is an explanatory diagram of an opening/closing arm 130; -
Fig. 8 is an explanatory diagram of acontact point 136a between the opening/closing arm 130 and aplaten bearing 121; -
Fig. 9 is an explanatory diagram of force exerted to thecontact point 136a; -
Fig. 10 is an explanatory diagram in a case where aplaten roller 120 is disengaged; -
Fig. 11 is an explanatory diagram of a projectingpart 138 provided in the opening/closing arm 130 (1); -
Fig. 12 is an explanatory diagram of the projectingpart 138 provided in the opening/closing arm 130 (2); -
Fig. 13 is an explanatory diagram of the printer apparatus of the embodiment (1); -
Fig. 14 is an explanatory diagram of the printer apparatus of the embodiment (2); -
Fig. 15 is an explanatory diagram of the printer apparatus of the embodiment (3); and -
Fig. 16 is an explanatory diagram of the printer apparatus of the embodiment (4). - In the following, embodiments of the present invention are described with reference to the accompanying drawings. Like components are denoted with like reference numerals and are not further explained.
- A printer apparatus according to an embodiment is described with reference to
Figs. 1-3 .Fig. 1 is a perspective view of a printer apparatus according to the embodiment,Fig. 2 is a perspective view illustrating the printer apparatus viewed from another angle in a state a housing cover is attached to the printer apparatus, andFig. 3 is a perspective view illustrating the printer apparatus from the same angle asFig. 2 in a state where agear part 180 and other elements are removed from the printer apparatus. As illustrated inFigs. 1-3 , the printer apparatus of the embodiment includes athermal head 110 which is a printer head, aplaten roller 120, an opening/closing arm 130, afirst biasing spring 140, and asecond biasing spring 150. Thethermal head 110, theplaten roller 120, the opening/closing arm 130, thefirst biasing spring 140, and thesecond biasing spring 150 are mounted to theframe 160. In the printer apparatus of the embodiment, theplaten roller 120 is supported by theframe 160 by force exerted from thefirst biasing spring 140. In this embodiment, a coil spring, a leaf spring or the like may be used as thefirst biasing spring 140, and a torsion spring or the like may be used as the second biasing spring. - A platen bearing 121 of the
platen roller 120 is rotatably supported by aframe side 161 of theframe 160. Amotor 170 for rotating theplaten roller 120 is provided to theframe 160. By rotating themotor 170, theplaten roller 120 is rotated via thegear part 180. - A
heat sink 111 corresponding to a head support plate is provided to a rear surface of thethermal head 110. Theframe 160 includes a framerear surface part 162 facing theheat sink 111. Thefirst biasing spring 140 such as a coil spring is provided between theheat sink 111 and the framerear surface part 162 of theframe 160. Thethermal head 110 is pressed toward a side in which theplaten roller 120 is provided owing to a recovering force of thefirst biasing spring 140 transmitted via theheat sink 111. - The opening/
closing arm 130 is supported by theframe side surface 161 to rotate and move about thearm rotation shaft 131. Thesecond biasing spring 150 such as a torsion coil spring is provided between the opening/closing arm 130 and theframe side surface 161. Specifically, although not illustrated in the drawings, one end of thesecond biasing spring 150 is connected to theframe part 160 and the other end of thesecond biasing spring 150 is connected to the opening/closing arm 130. The opening/closing arm 130 can be rotated and moved about thearm rotation shaft 131 by pressing an opening/closing armcap receiving part 134. By releasing the force exerted to the opening/closing armcap receiving part 134, the opening/closing armcap receiving part 134 moves upward by the recovering force of thesecond biasing spring 150. Thereby, the opening/closing arm 130 returns to its initial state. - Next, the
frame 160 is described with reference toFigs. 4-6 .Fig. 4 is a side view illustrating the printer apparatus of the embodiment,Fig. 5 is an enlarged view of a portion ofFig. 4 , andFig. 6 is a side view of theframe 160. - A
frame opening part 162 into which the platen bearing 121 can be guided is provided in theframe side surface 161 of theframe 160 for supporting theplaten roller 120. Theframe opening 162 is formed in a U-shape. First guidepart 163 and thesecond guide part 164 are formed at an inlet part of theframe opening part 162 for guiding the platen bearing 121 into theframe opening part 162. Thefirst guide part 163 is formed on a side more toward the thermal head 110 (heat sink 111) than thesecond guide part 164. Thefirst guide part 163 is formed longer than thesecond guide part 164. A line L1 extends along astraight edge part 163a formed in theframe opening part 162, and a line L2 extends along astraight edge part 164a formed in theframe opening part 162 are formed to be substantially parallel to each other. Further, the line L1 and the line L2 are formed in a direction that is substantially orthogonal to a direction of a recovery force of thefirst biasing member 140 of the embodiment. In the printer apparatus of the present invention, the platen bearing 121 is supported by contacting an insulatingpart 164a of thesecond guide part 164 by the recovering force of thefirst biasing spring 140. Therefore, the line L2 becomes a tangential line between theedge part 164a of thesecond guide part 164 and theplaten bearing 121. - The
edge part 164a of thesecond guide part 164 is formed on a line L3 that runs through acenter 121a of theplaten bearing 121. Alternatively, theedge part 164a of thesecond guide part 164 may be formed above the line L3 in the drawing. In thesecond guide part 164 of the printer apparatus according to this embodiment, thestraight edge part 164a overlapping the line L2 may be formed to have a length of approximately 0.2 mm. - Next, the opening/
closing arm 130 is described with reference toFigs. 4 ,5 , and7 . The opening/closing arm 130 is rotated and moved about thearm rotation shaft 131 by pressing the opening/closing armcap receiving part 134. An opening/closingarm opening part 135 into which the platen bearing 121 of theplaten roller 120 is inserted is provided in an opening/closing arm side surface. Alock part 136 is provided at a position that is the edge of the opening/closingarm opening part 135 and farthest from thearm rotation shaft 131. Anouter contact part 137 for pressing out the platen bearing 121 during the below-described removal of theplaten roller 120 is provided on the side opposite from thelock part 136 interposed by the opening/closingarm opening part 135.Fig. 7 is a side view of the opening/closing arm 130. - The platen bearing 121 of the
platen roller 120 according to this embodiment is pressed by the recovering force of thefirst biasing spring 140 in the direction of the arrow A1 as illustrated inFig. 4 . Further, theframe 160 is pressed by the platen bearing 121 in the direction of the arrow B1 inFig. 4 . Accordingly, the platen bearing 121 is rotatably supported by theframe 160. That is, the platen bearing 121 is supported in a state provided in the opening/closingarm opening part 135 while being supported by theframe 160 with respect to the biasing direction of the recovering force of thefirst biasing spring 140 illustrated with the arrow A1. Accordingly, the platen bearing 121 does not contact the opening/closing arm 130 with respect to the direction illustrated with the arrow B1. Therefore, the platen bearing 121 is not supported by the opening/closing arm 130. - The platen bearing 121 contacts the
lock part 131 of the opening/closing arm 130 at acontact point 136a, so that the platen bearing 121 can be prevented from moving in an upward/downward direction inFig. 5 . Accordingly, thelock part 136 does not support the platen bearing 121 with respect to the biasing direction of the recovering force of thefirst biasing spring 140 illustrated with the arrow A1 but is for preventing the platen bearing 121 from moving in a direction that is substantially orthogonal to the direction illustrated with the arrow A1. - Next, a relationship between the opening/
closing arm 130 and the platen bearing 121 of the printing apparatus of this embodiment is described with reference toFigs. 8 and9 . The below-described projectingpart 138 is provided in a part of the side surface of the opening/closing arm 130. - The printer apparatus of this embodiment has a structure in which the
platen roller 120 can easily detach from the printer apparatus when, for example, a force no less than a predetermined amount is exerted when the printer apparatus is dropped. Accordingly, even if, for example, the printer apparatus is dropped, a large amount of force is not applied to theplaten bearing 121 and the like via the opening/closing arm 130 and the like. Thus, a component formed of a mold resin such as the platen bearing 121 can be prevented from being damaged. - Specifically, the
contact point 136a between theplaten bearing 121 and thelock part 136 of the opening/closing arm 130 is positioned opposite from the side in which the thermal head 110 (heat sink 111) and thefirst biasing spring 140 are provided with respect to a line L4 illustrated inFig. 8. Fig. 8 illustrates the line L4 as a chain double-dashed line that connects acenter 131a of thearm rotation shaft 131 and thecenter 121a of theplaten bearing 121. That is, thecontact point 136a is formed in a position opposite from the direction in which theplaten roller 120 is disengaged (illustrated with an arrow C1) with respect to the line L4. - By forming the
contact point 136a in a position opposite from the direction in which theplaten roller 120 is disengaged (illustrated with the arrow C1 ofFig. 9 ) with respect to the line L4, a force is exerted to theplaten roller 120 in a direction causing the disengagement of the platen roller 120 (illustrated with the arrow C1 ofFig. 9 ) when, for example, the printer apparatus is dropped. Further, theplaten roller 120 can easily disengage because the opening/closing arm 130 can be moved even when the force exerted in the disengaging direction of theplaten roller 120 is relatively small. - A case of forming the contact point in a position on the side of the disengaging direction of the
platen roller 120 as illustrated with the arrow C1 (i.e. the side in which thethermal head 110 is provided) with respect to the line L4 is described. In this case, a force is exerted to theplaten roller 120 in a direction causing the removal of theplaten roller 120 as illustrated with the arrow C1. However, because the opening/closing arm 130 cannot be moved unless the force is significantly large, theplaten roller 120 cannot disengage. The force that is exerted to the printer apparatus in the direction causing removal of theplaten roller 120 is also exerted to the platen bearing 121 of theplaten roller 120 via the opening/closing arm 130. Therefore, the platen bearing 121 may be damaged by the exerted force. - With the printer apparatus of this embodiment, the
platen roller 120 can easily disengage from the printer apparatus when force is exerted to theplaten roller 120 in the direction illustrated with the arrow C1. Therefore, the platen bearing 121 or the like can be prevented from being damaged. That is, in a state ofFig. 10(a) , the printer apparatus of this embodiment can easily shift to a state ofFig. 10(b) when force is exerted in the direction C causing removal of theplaten roller 120. Thus, theplaten roller 120 can easily disengage from the printer apparatus. Accordingly, the platen bearing 121 or the like can be prevented from being damaged. - As illustrated in
Fig. 9 , the amount of force exerted to theplaten roller 120 of the printer apparatus during the removing of theplaten roller 120 depends on the size of the angle θ formed by the line L4 and thecontact point 136a. Specifically, if the value of the angle θ is small, theplaten roller 120 cannot disengage unless a relatively large amount of force is exerted to the printer apparatus. If the value of the angle θ is large, theplaten roller 120 can easily disengage even when an amount of force exerted to the printer apparatus is small. - The amount of force required to disengage the
platen roller 120 from the printer apparatus may differ depending on the purpose or usage of the printer apparatus. With the printer apparatus of this embodiment, the amount of force required for theplaten roller 120 to disengage from the printer apparatus can be adjusted by adjusting the angle θ, that is, the position of thecontact point 136a. In the printer apparatus of this embodiment, thecontact point 136a is formed to be positioned between the line L3 and the line L4. - In a case where the
contact point 136a is positioned between the line L3 and the line L4 as illustrated inFig. 9 , the amount of force that causes theplaten roller 120 to disengage from the printer apparatus may be changed due to a slight change in the position of thecontact point 136a. That is, even in a case where the printer apparatus is designed to cause theplaten roller 120 to disengage from the printer apparatus when a predetermined amount of force is exerted to the printer apparatus, the position of thecontact point 136a may deviate from a desired position due to, for example, manufacturing error. Thus, some printer apparatuses may cause theplaten roller 120 to disengage from the printer apparatus whereas some printer apparatus may cause theplaten roller 120 not disengage from the printer apparatus. Thus, if theplaten roller 120 is not disengaged from the printer apparatus even when a large amount of force is exerted to the printer apparatus, the printer apparatus may be damaged when, for example, the printer apparatus is dropped. - Therefore, in this embodiment, the projecting
part 138 is provided in the opening/closing arm 130 as illustrated inFigs. 11 and12 . - By allowing the projecting
part 138 and theframe 160 to contact each other, theplaten bearing 121 and thelock part 136 of the opening/closing arm 130 can contact at a predetermined position which is thecontact point 136a. - Accordingly, with the printer apparatus of this embodiment, the
platen roller 120 can almost always disengage from the printer apparatus when a substantially constant amount of force is exerted to the printer apparatus. Thereby, the platen bearing 121 or the like can be further prevented from being damaged. - Next, an operation of the opening/closing arm of the printer apparatus according to the embodiment is described with reference to
Figs. 13(a)-16(b) . -
Fig. 13 illustrates the printer apparatus of the embodiment in a state prior to having alever cap 234 attached thereto. Assuming that the side in which theplaten 120 is provided corresponds to the front side,Fig. 13(a) is a perspective view of the printer apparatus observed from the front side, andFig. 13(b) is a perspective view of the printer apparatus observed from the rear side.Fig. 14 illustrates the printer apparatus of the embodiment in a state having thelever cap 234 attached thereto.Fig. 14(a) is a perspective view of the printer apparatus observed from the front side, andFig. 14(b) is a perspective view of the printer apparatus observed from the rear side.Fig. 15 illustrates the printer apparatus of the embodiment in a state having adepression button 240 attached thereto.Fig. 15(a) is a perspective view of the printer apparatus observed from the front side, andFig. 15(b) is a perspective view of the printer apparatus observed from the rear side.Fig. 16(a) illustrates a state where thedepression button 240 is not yet pressed, andFig. 16(b) illustrates a state where thedepression button 240 is pressed. - In the printer apparatus of the embodiment, the opening/closing arm
cap receiving part 134 is provided in the opening/closing arm 130 as illustrated inFig. 13 . However, in actual use, thelever cap 234 is attached to the opening/closing armcap receiving part 134 as illustrated inFig. 14 , and thedepression button 240 is attached to thelever cap 234 as illustrated inFig. 15 . Accordingly, the opening/closing arm 130 can be operated to move by pressing thedepression button 240 interposed by thelever cap 234 and the opening/closing armcap receiving part 134. That is, thelever cap 234 is lowered from the state illustrated inFig. 16(a) to the state illustrated inFig. 16(b) by depressing thedepression button 240. Thereby, the opening/closing arm 130 is operated to move about thearm rotation shaft 131. - Although the embodiments of the present invention have been described in detail, it should be understood that the various changes, substitutions, and alterations could be made hereto without departing from the spirit and scope of the invention.
-
- 110
- thermal head (printer head)
- 111
- heat sink (head support plate)
- 120
- platen roller
- 121
- platen bearing
- 121a
- center of platen bearing
- 130
- opening/closing arm
- 131
- arm rotation shaft
- 131a
- center of arm rotation shaft
- 134
- opening/closing cap receiving part
- 135
- opening/closing arm opening part
- 136
- lock part
- 136a
- contact part
- 137
- outer contact part
- 138
- projecting part
- 140
- first biasing spring
- 150
- second biasing spring
- 160
- frame
- 161
- frame side surface
- 162
- frame opening part
- 163
- first guide part
- 163a
- edge part
- 164
- second guide part
- 164a
- edge part
- 170
- motor
- 180
- gear part
- 234
- lever cap
- 240
- depression button
Claims (4)
- A printer apparatus comprising:a frame;a printer head;a platen roller that is supported by the frame;a biasing member that is provided between the frame and the printer head and configured to exert force toward the platen roller; andan opening/closing arm supported by the frame to rotate and move about an arm rotation shaft;wherein a contact part between the opening/closing arm and a platen bearing of the platen roller is positioned opposite from a side in which the printer head is provided with respect to a line that connects a center of the arm rotation shaft and a center of the platen bearing.
- The printer apparatus as claimed in claim 1,
wherein the platen roller is supported by the frame by way of a recovering force of the biasing member via the printer head,
wherein the platen roller can be disengaged by moving the opening/closing arm about the arm rotation shaft. - The printer apparatus as claimed in claim 1, wherein the contact part is a contact point corresponding to a point of contact.
- The printer apparatus as claimed in claim 1,
wherein a projecting part that contacts the frame is provided in the opening/closing arm,
wherein a position of the contact part is defined by the projecting part of the opening/closing arm contacted to the frame.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012046990A JP5865126B2 (en) | 2012-03-02 | 2012-03-02 | Printer device |
PCT/JP2013/054827 WO2013129340A1 (en) | 2012-03-02 | 2013-02-25 | Printer device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2821234A1 true EP2821234A1 (en) | 2015-01-07 |
EP2821234A4 EP2821234A4 (en) | 2017-08-09 |
EP2821234B1 EP2821234B1 (en) | 2020-05-13 |
Family
ID=49082537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13754524.0A Active EP2821234B1 (en) | 2012-03-02 | 2013-02-25 | Printer device |
Country Status (6)
Country | Link |
---|---|
US (1) | US9061530B2 (en) |
EP (1) | EP2821234B1 (en) |
JP (1) | JP5865126B2 (en) |
KR (1) | KR101643485B1 (en) |
CN (2) | CN105946376B (en) |
WO (1) | WO2013129340A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023126082A1 (en) * | 2021-12-30 | 2023-07-06 | John Cockerill S.A. | Automated device for locking and unlocking bearings |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106660376A (en) * | 2014-07-07 | 2017-05-10 | 富士通电子零件有限公司 | Printer device |
JP2017081129A (en) * | 2015-10-30 | 2017-05-18 | 富士通コンポーネント株式会社 | Printer |
JP6996103B2 (en) * | 2017-03-31 | 2022-01-17 | セイコーエプソン株式会社 | Recording device |
KR102337520B1 (en) * | 2018-07-18 | 2021-12-10 | 주식회사 빅솔론 | Platen roller installation structure of printer |
JP7178279B2 (en) * | 2019-01-29 | 2022-11-25 | 富士通コンポーネント株式会社 | printer device |
Family Cites Families (16)
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JP2868855B2 (en) * | 1990-07-17 | 1999-03-10 | 株式会社リコー | Recording device |
JP2000094767A (en) | 1998-09-25 | 2000-04-04 | Fujitsu Takamisawa Component Ltd | Thermal printer |
JP3599595B2 (en) | 1999-05-10 | 2004-12-08 | セイコーインスツル株式会社 | Thermal printer |
JP3963697B2 (en) * | 2001-10-19 | 2007-08-22 | 富士通コンポーネント株式会社 | Thermal printer |
JP3734753B2 (en) | 2001-12-28 | 2006-01-11 | セイコーインスツル株式会社 | Thermal printer |
JP4690135B2 (en) | 2005-06-22 | 2011-06-01 | 富士通コンポーネント株式会社 | Printing device |
JP5108072B2 (en) * | 2005-06-22 | 2012-12-26 | 富士通コンポーネント株式会社 | Printing device |
JP4761464B2 (en) * | 2006-09-15 | 2011-08-31 | セイコーインスツル株式会社 | Thermal printer |
JP2009143133A (en) | 2007-12-14 | 2009-07-02 | Seiko Instruments Inc | Thermal printer |
JP2009202424A (en) * | 2008-02-28 | 2009-09-10 | Fujitsu Frontech Ltd | Opening and closing mechanism of recording paper cover, and portable terminal apparatus with this |
JP5260207B2 (en) * | 2008-09-22 | 2013-08-14 | シチズン・システムズ株式会社 | Transport mechanism and printer |
JP2011073372A (en) * | 2009-09-30 | 2011-04-14 | Seiko Instruments Inc | Thermal printer |
JP5627076B2 (en) * | 2010-02-10 | 2014-11-19 | シチズンホールディングス株式会社 | Thermal printer |
JP5460365B2 (en) * | 2010-02-10 | 2014-04-02 | シチズンホールディングス株式会社 | Thermal printer |
JP2011168029A (en) * | 2010-02-22 | 2011-09-01 | Seiko Instruments Inc | Printer |
EP2765005B1 (en) * | 2011-10-07 | 2017-12-06 | Fujitsu Component Limited | Printer device |
-
2012
- 2012-03-02 JP JP2012046990A patent/JP5865126B2/en active Active
-
2013
- 2013-02-25 CN CN201610283835.1A patent/CN105946376B/en active Active
- 2013-02-25 WO PCT/JP2013/054827 patent/WO2013129340A1/en active Application Filing
- 2013-02-25 CN CN201380011902.9A patent/CN104159750B/en active Active
- 2013-02-25 KR KR1020147023199A patent/KR101643485B1/en active IP Right Grant
- 2013-02-25 EP EP13754524.0A patent/EP2821234B1/en active Active
-
2014
- 2014-08-28 US US14/471,238 patent/US9061530B2/en active Active
Non-Patent Citations (1)
Title |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2023126082A1 (en) * | 2021-12-30 | 2023-07-06 | John Cockerill S.A. | Automated device for locking and unlocking bearings |
Also Published As
Publication number | Publication date |
---|---|
US20140368598A1 (en) | 2014-12-18 |
US9061530B2 (en) | 2015-06-23 |
CN105946376A (en) | 2016-09-21 |
KR101643485B1 (en) | 2016-08-10 |
EP2821234B1 (en) | 2020-05-13 |
KR20140119749A (en) | 2014-10-10 |
JP5865126B2 (en) | 2016-02-17 |
JP2013180524A (en) | 2013-09-12 |
CN104159750A (en) | 2014-11-19 |
WO2013129340A1 (en) | 2013-09-06 |
EP2821234A4 (en) | 2017-08-09 |
CN105946376B (en) | 2018-06-26 |
CN104159750B (en) | 2016-06-08 |
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